I'd have to agree with Derek on this one. I do not recognize Grimes amongst the group.
Furthermore, this post card shows the Lookouts schedule on the reverse which means that it was created prior to the beginning of the season.
https://sabr.org/bioproj/person/burleigh-grimes/
But this article on sabr.org tells us that:
"(Grimes) started the 1913 season with the Ottumwa (Iowa) Packers of the Central Association, where he was so effective that the Detroit Tigers purchased his contract for $400. After a week the Tigers shipped Grimes to Class A Chattanooga without his ever having put on a Detroit uniform."
Which means that Grimes would not have been present for a pre season photoshoot.